Collapsible seat



FIG. 1 is a view from the front and one side;

FIG. 2 is a view from the rear and the other side;

FIG. 3 is a view from the front and one side with the seat partially lowered;

FIG. 4 is a view from the front and one side with the back lifted;

FIG. 5 is a view from the front and one side partially collapsed, and,

FIG. 6 is a view from the front and one side fully collapsed.

FIG. 6 has been shown on an enlarged scale. 

The ornamental design for a collapsible seat, as shown and described. 